In small bowl, combine ingredients for dressing. Mix until thoroughly blended; chill. In large shallow bowl or platter, combine ingredients for salad; cover and chill. Heat broiler. Lightly spray rack of broiler pan with cooking spray. Place oats, cheese and cumin in blender container or food processor bowl; cover. Blend on high speed or process about 1 minute, stopping occasionally to stir; set aside. Pound each chicken breast half between sheets of waxed paper to 1/4-inch thickness. Spread mustard thinly over both sides of chicken; coat with oat mixture. Place chicken on broiler pan; spray one side of chicken evenly with cooking spray to coat completely, about 10 seconds. Broil about 6 inches from heat 3 to 4 minutes; remove pan from broiler. Turn chicken over; spray with cooking spray to coat, about 10 seconds. Broil an additional 3 to 4 minutes or until golden brown and no longer pink in center. Toss salad with dressing; place warm chicken over top. Serve with additional orange wedges and cilantro, if desired.